Hardware Made Easy!
Camco
2 pack, 3/4" npt x 3/4" npt x 3"l, dielectric water heater heat trap, helps prevent heat escape through inlet & outlet while idle, self cleaning fittings help prevent corrosion, dielectric inert thermoplastic lining.
Genova Products Insert Fittings Steel Insert Coupling
Tigre USA Reducing Male Adapter (Reducing Mipt x Insert)
Tigre USA Reducing Male Adapter (MIPT x Reducing Insert)
Master Plumber 1/3-HP Sump Pump Zinc & Plastic
Fernco Proflex Shielded Specialty Coupling